i want to use dream clock method( link ) in my next lucid dream,but does the lucid dream become less vivid if i use this 
?
I can’t see any reason why it would and if I look at WritersCube journals it surely doesn’t seem to be. I would recommend just trying it first. If you succeed and don’t like it for whatever reason, you can always choose not to use it anymore.
BTW, it’s usually better to post related questions in the existing topic, rather then opening a new one. This way all information about one subject can be found in the same topic.